X300 getting old - what next???

My X300 is getting a bit long in the tooth and the warranty will expire in early next year, si I am thinking about a replacement. The only problem is with what?? There doesn't seem to be a current model in the X300 range - was it a side track? Have Lenovo dropped that range. It suits me pretty well - I'd like more RAM and a faster processor, all the normal things I'd get with an X310, or whatever.... (There was an X301 but that didn't seem to be a big upgrade and anyway, it's not listed any more.) Have I missed something or have Lenovo quietly shelved the X300 line?? Rgrds F